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3 years ago

Which is the balanced equation for: Al2O3 + Fe – Fe3O4 + AL

Chemistry

1 answer:

Sloan [31]3 years ago

6 0

Answer:

4Al203 + 9Fe -> 3Fe3O4 + 8Al

Amount of Al on reactant side: 8

Amount of Al on product side: 8

Amount of O on reactant side: 12

Amount of O on product side: 12

Amount of Fe on reactant side: 9

Amount of Fe on product side: 9

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The theoretical yield of a reaction is the amount of product obtained if the limiting reactant is completely converted to produc

docker41 [41]

Answer:

The theoretical yield of NH3 produced by the reaction is 16.89 grams

Explanation:

Step 1: Data given

Mass of N2 = 13.90 grams

Molar mass of N2 = 28.0 g/mol

Mass H2 = 6.440 grams

Molar mass H2 = 2.02 g/mol

Step 2: The balanced equation

N2(g) + 3 H2(g) → 2 NH3(g)

Step 3: Calculate moles

Moles = mass / molar mass

Moles N2 = 13.90 grams / 28.0 g/mol

Moles N2 = 0.496 moles

Moles = 6.440 grams / 2.02 g/mol

Moles H2 = 3.19 moles

Step 4: Calculate limiting reactant

For 1 mol N2 we need 3 moles H2 to produce 2 moles NH3

N2 is the limiting reactant. It will completely be consumed (0.496 moles)

H2 is in excess. There will react 3*0.496 = 1.488 moles

there will remain 3.19 - 1.488 = 1.702 moles

Step 5: Calculate moles NH3

For 1 mol N2 we need 3 moles H2 to produce 2 moles NH3

For 0.496 moles N2 we will have 2*0.496 = 0.992 moles NH3

Step 6: Calculate mass NH3

Mass NH3 = moles NH3 * molar mass NH3

Mass NH3 = 0.992 moles * 17.03 g/mol

Mass NH3 = 16.89 grams

The theoretical yield of NH3 produced by the reaction is 16.89 grams

4 0

3 years ago

Solid mixture of one or more minerals and organic matter

Alborosie

Answer:

Rock

Explanation:

A rock is a solid mixture of one or more minerals and organic matter. Rock is often defined as an aggregate of minerals.

Minerals are solids that are made up of inorganic materials with a definite composition and a well ordered arrangement.

Rocks are usually classified based on their mode of formation.
They are often grouped as igneous, metamorphic and sedimentary.

3 0

3 years ago

What was helium used for in the past?

yawa3891 [41]

Helium used to be used in hot air balloons. Then, when the Hindenburg exploded, annexed file, they realized that hydrogen was not only lighter, but it also was less flammable.

6 0

3 years ago

Read 2 more answers

[20pts] I want to start counterfeiting American pennies. Each penny weighs 2.56g and I want $200.00 of pennies for my scheme. Se

Lera25 [3.4K]

Answer:

$\$200.00\times 100\dfrac{penny}{\$}\times \dfrac{2.56g}{penny}\times \dfrac{1molCu}{63.5gCu}\times \dfrac{2molAl}{3molCu}\times \dfrac{27gAl}{1molAl}$

Explanation:

The <em>dimensional analysis</em> helps you by focusing your attention into the units: you must set up the equation starting with the available units and add the factors with the units such that the cancelation of numerators and denominators ends up with the desired units: grams of aluminium in this case.

In this case, you start with a mass of 2.56 grams per penny, which is $2.56g/penny$ , whose value is $200.00 and want to end with the grams of

Aluminium needed.

Then, you must use the mole ratios derived from the chemical equation in a way that the units lead from grams of copper to grams of aluminium.

The equation is:

$2Al(s)+3CuCl_2(aq)\rightarrow 2AlCl_3(aq)+3Cu(s)$

From which, the mole ratio between copper and aluminium is:

$2molAl(s):3molCu(s)\\\\\dfrac{2molAl}{3molCu},or\\\\\\\dfrac{3molCu}{2molAl}$

You must also use the atomic masses of Cu and Al which are 63.5g/mol and 27g/mol respectively.

The equation is:

$\$200.00\times 100\dfrac{penny}{\$}\times \dfrac{2.56g}{penny}\times \dfrac{1molCu}{63.5gCu}\times \dfrac{2molAl}{3molCu}\times \dfrac{27gAl}{1molAl}$

You can check that afeter multiplying all the factors, the most units will cancel and the final units will be grams of Al.

8 0

3 years ago

How does a rock from the mountain become a pebble on the shore

Semmy [17]

From erosion i think good luck :D

7 0

3 years ago

Read 2 more answers